/*
 * Copyright (c) [2012] - [2017] Red Hat, Inc.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *   Red Hat, Inc. - initial API and implementation
 */
package com.codenvy.swarm.client;

import com.codenvy.swarm.client.model.DockerNode;
import java.io.IOException;
import java.util.List;
import java.util.Random;

/**
 * Random selection strategy for Swarm connector.
 *
 * @author Eugene Voevodin
 */
public class RandomNodeSelectionStrategy implements NodeSelectionStrategy {

  private static final Random random = new Random();

  @Override
  public DockerNode select(List<DockerNode> uris) throws IOException {
    if (uris.size() == 0) {
      throw new IOException("No docker nodes available");
    }
    return uris.get(random.nextInt(uris.size()));
  }
}
